>>317
There's a typo in one of the CSS rules:

.unkfunc {
background:inert;

It's "inherit" , not inert. Loading a wakababoard on firefox spams 2 lines of "Warning: Expected color but found 'inert'. Error in parsing value for property 'background'. Declaration dropped."
(Two because the typo is in both futaba.css and gurochan.css)
It's annoying when you're trying to debug javascript errors on wakaba, as every page gives those two errors.

Just deleting that line will have no effect on the rendering of the page, since all browsers are just ignoring it.
(I finally managed to get 4chan to fix this same CSS error.)